Piranha barking reveals fish identities in murky water

Photo of Piranha barking reveals fish identities in murky water
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Piranhas are known for their sharp teeth and carnivorous appetites, but few think about the sounds they make. These small fish “bark” by contracting their gas bladders to produce a noise. A new study reveals that these barking sounds differ based on species and offer a way for researchers to identify the fish even in dark waters. An upcoming talk … Continue reading
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